Pulley block



B. E. BARNES PULLEY BLOCK July 24, E923.

Filed June 8, 1922 Xiwwh N. unina? man STATES maan BROWN E. BARNES, OF PORTLAND, OREGON, ASSIGNOR TO WILLAMET'IE IRONIu STEEL WORKS,` or PORTLAND, OREGON,

A CORPORATION OF OREGON.

PULLEY BLOCK.

` Application led June 8,

To aZZ whom t may concern:

Be it known that I, BROWN E. BARNES, a citizen of the United States, residing at Portland, inthe countyof Multnomah and State of Oregon, have invented new and useful Improvements in Pulley Blocks, of which the following is a specification.

This invention is designed to improve the construction of a pulleyblock, particularly the mountingof the journalpin, the construction making a very much `more rigid and secure mounting for the pin and at the same time leaving the block with less obstruction on the sides than with blocksas ordinarily constructed. Further the construction tends to lock the cheeks of the pulley block together vso as to strengthen the structure. Other details of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a central vertical section through. a pulley block.

Fig. 2 a section on the line 2-2 in Fig. 1.

Fig. 3 a view similar to Fig. 1 of an alternative construction.

Fig. 4 a section on the line 4-4 in Fig. 3.

1 marks the sheave7 2 the hub of the sheave, 3 a bearing bushing fixed in the sheave.y and 4 the sheave pin.-

The sheave pin has the locking extensions 5 which extend into openings 6 in the cheek pieces 7. One wall of the opening' G has a wedging or locking surface 8 and the extensions 5 have the undercut surfaces 9 which rest on the surfaces 8. It will readily be seen that if these surfaces are locked together the cheek pieces are locked against spreading. wedging surfaces 1()a which operate against `the wedging surfaces 11 at the opposite side of the opening 6 from the surface 8. rI`he wedge blocks have the wedge projections 12 which extend between the surfaces 11 and the extensions 5 at a point opposite the locking surfaces 9. The wedge blocks 10 have perforations 13 and a tie bolt 14 extends through these perforations, the head 14 at one end and nut 14a at the opposite end being arranged in sockets 15 in the wedge blocks 10.

As the tie rod is tightened drawing the wedge blocks 10 inwardly the wedginglip 12 wedges between the surface 11 and the The wedge blocks 10 have the 4 1922. Serial No. 566,863.

surface of the extension 5 thus, clampingl the wedge block has wedging surfaces 10b operating against a flat wedging surfacev 11a, the lip 12a and the flattened portion 5b forcing the extension into locking engagement with the walls of the opening but locking the pin against rotation.

What I claim as new is 1. In a pulley block, the combination of a sheave; cheek pieces; a bearing pin for the sheave mounted in the cheek pieces with an undercut connection; and a tie rod extending through the pin securing the pin and cheek pieces.

2. In a pulley block, the combination of a sheave; cheek pieces; and a bearing pin for the sheave mounted in the cheek pieces with an undercut connection.

The upper pory tion of the extension is flattened at 5b and us the pin locks the cheeks 'i 1 and 2 is'flat and @Ily.

wedging between the surface 11u thus not only 3. In a pulley block, the combination of a v sheave; cheek pieces for the sheave; a bearing pin for the sheave mounted in the cheek pieces with anl undercut connection; locking pieces clamping the connection; and means exerting clamping pressure on the locking pieces.

4. In a pulley block, the combination of a sheave; cheek pieces for the sheave; a bearing pin for the sheave mounted in the cheek pieces with an undercut connection; locking pieces clamping the connection; and a tie rod between the locking pieces exerting clamping pressure thereon.

5. In a pulley block, the combination of a sheave; cheek pieces for the sheave; a bearing pin for the sheave mounted in the cheek pieces with an undercut connection; locking pieces clamping the connection; and a tie rod between the locking pieces exerting' clamping pressure thereon, saidi lockof the tie rod.

6 'le a nulles block, the Csebieetioe @if :e wedge kzloks` weging bewees the Wedge sheave; eheekpieces; a bearing' pin fonthe suxriaees and the extensions; andy means eX- sheave mounted in the cheek pieces With an ertng pressure onthe blocks.

e tios; end means. f or 1001s 19- le e pulley block, .the ,@Qmhnetiee 9i 111e t' enfle "'Sfi r. atn e sheaves will '012 ivhe'h the Se@@viel` iS 30M- having iekingundereut eX- 7. Ina pui f1 bIoekQtheoombination of a naled; said pinsheave; cheek pieces for the sheave; alegan tensions; cheek pieces having openings reing pin for the sheave mountedin the cheek ceving the extensions with Walls looking pieces with an undercutconneetion; Wedge, therewithhaying opposing wedge surfaces; bloks clamping the connection; and means Wedge blocks Wedging between the Wedge eeftnglatnpingf pires'snif'e on" the Wedge surfaces and the extensions; and tie rods elt-` bj iisg Isaid"v-edg'ge 'biock'sloeiing the pin tendingk between the blocks., through the pin. aga Vst 'rotatrQn v i l1. 1inl a pulleyr block; the combination of apiille blogia, the Combination ot a a sheave; a pin on WhipV h the sheave. isA joursleaife'; a/p'lin which "the sheave "is jour naled; said pin-having Locking. undercut e1;-A nled, saidpn'haV-ing-lockingundeout eX- tensions;` Cheek pieces having' openings eifi'eek pieces' having openings receiving. the extensions with walls looking.

tensi," ns 'f' 'efiifi the' extensions with Wallsflpeki'ng therewith having opposing wedge surfaces; the" ith hay-ing opposing'wedge surfaces; Wedge blocks Wed'gingl between the; Wedge andfvedge" bioeks ivedg'ing' 'between the' suisiaoes. and the. extensions ;l and tie nods exeA Wfedgef suiac'es and the extensions. tending between the blocks through the pin. iapuiiey block, Vthe Combination of a said Wedge blocks having sockets receiving. skewers v in on 4zslfiihthe sheave is Jour-y the headsfofthe tie rods.

sai'd pinhaving 'ioekingundereut ex- In' testimony whereoi'j have hereuntoA s et tgnsi ns; Heek pie'es leaving openings renay hand.

geen the geeneens with"wa11sj1eisng 'Wedge surfaces; E'. BARNES. 

